TCS 109300 Allison 1000 4140 Billet C-2 Clutch Hub 2001-2016

Its no secret the Allison OE C2 hub lacks in durability. TCS addressed this failure area with their billet c2 hub upgrade. DHD recommends this upgrade on any build over 750hp as well as trucks used for pulling, drag racing or boosted launches.

Highlights:

4140 HTSR Billet Steel

+.125" More Shaft Spline Contact

+.100" Spline Boss Diameter

Added clutch spline length to accommodate 1 additional clutch friction

Within 2oz of OEM clutch weight

Fitment:

Fits All Allison LCT1000 Transmissions

Download Sun Gear Modification Instructions